US7508798B2 - Virtual mimo communication system - Google Patents

Virtual mimo communication system Download PDF

Info

Publication number
US7508798B2
US7508798B2 US10/321,999 US32199902A US7508798B2 US 7508798 B2 US7508798 B2 US 7508798B2 US 32199902 A US32199902 A US 32199902A US 7508798 B2 US7508798 B2 US 7508798B2
Authority
US
United States
Prior art keywords
mobile terminals
data
mobile terminal
unique
sub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US10/321,999
Other languages
English (en)
Other versions
US20040114618A1 (en
Inventor
Wen Tong
Jianglei Ma
Peiying Zhu
Ming Jia
Dong-Sheng Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Malikie Innovations Ltd
Original Assignee
Nortel Networks Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nortel Networks Ltd filed Critical Nortel Networks Ltd
Priority to US10/321,999 priority Critical patent/US7508798B2/en
Assigned to NORTEL NETWORKS LIMITED reassignment NORTEL NETWORKS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JIA, MING, MA, JIANGLEI, TONG, WEN, YU, DONG-SHENG, ZHU, PEIYING
Priority to CN201210216232.1A priority patent/CN102938667B/zh
Priority to KR1020057010955A priority patent/KR101033104B1/ko
Priority to EP03778621A priority patent/EP1576756A2/fr
Priority to CN2003801097447A priority patent/CN1748383B/zh
Priority to EP07120063.8A priority patent/EP1890415B1/fr
Priority to EP10183982.7A priority patent/EP2363969B1/fr
Priority to PCT/IB2003/005947 priority patent/WO2004056029A2/fr
Priority to EP10183976A priority patent/EP2365656A1/fr
Priority to AU2003285626A priority patent/AU2003285626A1/en
Publication of US20040114618A1 publication Critical patent/US20040114618A1/en
Priority to HK08106645.8A priority patent/HK1112546A1/zh
Publication of US7508798B2 publication Critical patent/US7508798B2/en
Application granted granted Critical
Assigned to Rockstar Bidco, LP reassignment Rockstar Bidco, LP ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NORTEL NETWORKS LIMITED
Assigned to 2256355 ONTARIO LIMITED reassignment 2256355 ONTARIO LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Rockstar Bidco, LP
Assigned to RESEARCH IN MOTION LIMITED reassignment RESEARCH IN MOTION LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: 2256355 ONTARIO LIMITED
Assigned to BLACKBERRY LIMITED reassignment BLACKBERRY LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: RESEARCH IN MOTION LIMITED
Assigned to OT PATENT ESCROW, LLC reassignment OT PATENT ESCROW, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLACKBERRY LIMITED
Assigned to MALIKIE INNOVATIONS LIMITED reassignment MALIKIE INNOVATIONS LIMITED NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: OT PATENT ESCROW, LLC
Assigned to MALIKIE INNOVATIONS LIMITED reassignment MALIKIE INNOVATIONS LIMITED NUNC PRO TUNC ASSIGNMENT (SEE DOCUMENT FOR DETAILS). Assignors: BLACKBERRY LIMITED
Assigned to OT PATENT ESCROW, LLC reassignment OT PATENT ESCROW, LLC CORRECTIVE ASSIGNMENT TO CORRECT THE COVER SHEET AT PAGE 50 TO REMOVE 12817157 PREVIOUSLY RECORDED ON REEL 063471 FRAME 0474. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: BLACKBERRY LIMITED
Assigned to MALIKIE INNOVATIONS LIMITED reassignment MALIKIE INNOVATIONS LIMITED CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION NUMBER PREVIOUSLY RECORDED AT REEL: 064015 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: OT PATENT ESCROW, LLC
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0669—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different channel coding between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0026—Division using four or more dimensions

Definitions

  • the present invention relates to communications, and more particularly relates to providing a virtual multiple input multiple output communication environment using mobile terminals having only a single transmission path and antenna.
  • MIMO multiple input multiple output
  • PDAs wireless personal digital assistants
  • the present invention provides an effective way to create a virtual MIMO transmission system using mobile terminals that have only one transmit path and antenna. This is accomplished by assigning mobile terminals to a group and assigning certain shared resources and user-specific resources to those mobile terminals in the group. In a synchronized fashion, the mobile terminals will provide uplink transmission in concert, as if they were a single entity having multiple transmission paths and antennas. Preferably, the shared resources bear on how the data is transmitted, and the user-specific resources relate to pilot signals.
  • the data transmitted may be encoded in any number of ways, and in one embodiment, the mobile terminals may relay their information to each other, such that uplink transmissions can incorporate STTD decoding or other space-time codes.
  • the invention is applicable to virtually any multiple access technology, including OFDM, TDMA, and CDMA, preferably synchronous CDMA.
  • FIG. 1 is a block representation of a wireless communication environment according to one embodiment of the present invention.
  • FIG. 2 is a block representation of a base station according to one embodiment of the present invention.
  • FIG. 3 is a block representation of a mobile terminal according to one embodiment of the present invention.
  • FIG. 4 is a more detailed logical representation of a mobile terminal according to one embodiment of the present invention.
  • FIG. 5 is a more detailed logical representation of a base station according to one embodiment of the present invention.
  • FIG. 6 illustrates a multiple input multiple output (MIMO) communication scheme according to the prior art.
  • FIG. 7 is a flow diagram representing the basic operation of one embodiment of the present invention.
  • FIGS. 8A and 8B illustrate a first OFDM virtual MIMO environment according to the present invention.
  • FIGS. 9A and 9B illustrate a second OFDM virtual MIMO environment according to the present invention.
  • FIGS. 10A and 10B illustrate a third OFDM virtual MIMO environment according to the present invention.
  • FIG. 11 illustrates a first synchronous CDMA virtual MIMO environment according to the present invention.
  • FIG. 12 is a flow diagram representing the basic operation of a second embodiment of the present invention.
  • FIGS. 13A-13C illustrate out-of-band relay of information between mobile terminals according to one embodiment of the present invention.
  • FIG. 14 represents in-band relay of information between mobile terminals according to a second embodiment of the present invention.
  • FIGS. 15-17 illustrate various orders of STTD encoding when relating information between mobile terminals according to the present invention.
  • a base station controller (BSC) 10 controls wireless communications within multiple cells 12 , which are served by corresponding base stations (BS) 14 .
  • Each base station 14 facilitates communications with mobile terminals 16 , which are within the cell 12 associated with the corresponding base station 14 .
  • the base stations 14 include multiple antennas to provide spatial diversity for communications.
  • the mobile terminals 16 may or may not have multiple antennas, depending on the implementation of the present invention.
  • the base station 14 generally includes a control system 20 , a baseband processor 22 , transmit circuitry 24 , receive circuitry 26 , multiple antennas 28 , and a network interface 30 .
  • the receive circuitry 26 receives radio frequency signals through the antennas 28 bearing information from one or more remote transmitters provided by mobile terminals 16 .
  • a low noise amplifier and a filter (not shown) cooperate to amplify and remove broadband interference from the signal for processing.
  • Downconversion and digitization circuitry (not shown) will then downconvert the filtered, received signal to an intermediate or baseband frequency signal, which is then digitized into one or more digital streams.
  • the baseband processor 22 processes the digitized received signal to extract the information or data bits conveyed in the received signal. This processing typically comprises demodulation, decoding, and error correction operations. As such, the baseband processor 22 is generally implemented in one or more digital signal processors (DSPs).
  • DSPs digital signal processors
  • the received information is then sent across a wireless network via the network interface 30 or transmitted to another mobile terminal 16 serviced by the base station 14 .
  • the network interface 30 will typically interact with the base station controller 10 and a circuit-switched network forming a part of a wireless network, which may be coupled to the public switched telephone network (PSTN).
  • PSTN public switched telephone network
  • the baseband processor 22 receives digitized data, which may represent voice, data, or control information, from the network interface 30 under the control of the control system 20 , and encodes the data for transmission.
  • the encoded data is output to the transmit circuitry 24 , where it is modulated by a carrier signal having a desired transmit frequency or frequencies.
  • a power amplifier (not shown) will amplify the modulated carrier signal to a level appropriate for transmission, and deliver the modulated carrier signal to the antennas 28 through a matching network (not shown).
  • the multiple antennas 28 and the replicated transmit and receive circuitries 24 , 26 provide spatial diversity. Modulation and processing details are described in greater detail below.
  • a mobile terminal 16 configured according to one embodiment of the present invention is illustrated.
  • the mobile terminal 16 will include a control system 32 , a baseband processor 34 , transmit circuitry 36 , receive circuitry 38 , antenna 40 , and user interface circuitry 42 .
  • the receive circuitry 38 receives radio frequency signals through the antenna 40 bearing information from one or more base stations 14 .
  • a low noise amplifier and a filter cooperate to amplify and remove broadband interference from the signal for processing.
  • Downconversion and digitization circuitry (not shown) will then downconvert the filtered, received signal to an intermediate or baseband frequency signal, which is then digitized into one or more digital streams.
  • the baseband processor 34 processes the digitized received signal to extract the information or data bits conveyed in the received signal. This processing typically comprises demodulation, decoding, and error correction operations, as will be discussed in greater detail below.
  • the baseband processor 34 is generally implemented in one or more digital signal processors (DSPs) and application specific integrated circuits (ASICs).
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • the baseband processor 34 receives digitized data, which may represent voice, data, or control information, from the control system 32 , which it encodes for transmission.
  • the encoded data is output to the transmit circuitry 36 , where it is used by a modulator to modulate a carrier signal that is at a desired transmit frequency or frequencies.
  • a power amplifier (not shown) will amplify the modulated carrier signal to a level appropriate for transmission, and deliver the modulated carrier signal to the antenna 40 through a matching network (not shown).
  • multiple antennas 40 and replicated transmit and receive circuitries 36 , 38 provide spatial diversity. Modulation and processing details are described in greater detail below.
  • a logical transmission architecture is provided according to one embodiment of the present invention.
  • the transmission architecture is described as being that of the mobile terminal 16 , but those skilled in the art will recognize the applicability of the illustrated architecture for both uplink and downlink communications in a variety of wireless environments.
  • the transmission architecture is intended to represent a variety of multiple access architectures, including, but not limited to orthogonal frequency division multiplexing (OFDM), code division multiple access (CDMA), frequency division multiple access (FDMA), and time division multiple access (TDMA).
  • OFDM orthogonal frequency division multiplexing
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • Data to be transmitted 44 which is a stream of bits, is scrambled in a manner reducing the peak-to-average power ratio associated with the data using data scrambling logic 46 .
  • a cyclic redundancy check (CRC) for the scrambled data is determined and appended to the scrambled data using CRC adding logic 48 .
  • CRC cyclic redundancy check
  • channel coding is performed using channel encoder logic 50 to effectively add redundancy to the data to facilitate recovery and error correction at the mobile terminal 16 .
  • the channel encoder logic 50 uses known Turbo encoding techniques in one embodiment.
  • the encoded data is then processed by rate matching logic 52 to compensate for the data expansion associated with encoding.
  • Bit interleaver logic 54 systematically reorders the bits in the encoded data to minimize the loss of consecutive data bits.
  • the resultant data bits are systematically mapped into corresponding symbols depending on the chosen baseband modulation by mapping logic 56 .
  • mapping logic 56 Preferably, a form of Quadrature Amplitude Modulation (QAM) or Quadrature Phase Shift Key (QPSK) modulation is used.
  • QAM Quadrature Amplitude Modulation
  • QPSK Quadrature Phase Shift Key
  • the mobile terminal 16 may provide multiple transmit paths to provide spatial diversity.
  • processors may be used to provide such analog or digital signal processing, alone or in combination with other processing described herein.
  • the multiple access modulation function 62 in a CDMA function would provide the requisite pilot, PN, and scrambling code multiplication, wherein an OFDM function would operate on the respective symbols using inverse discrete Fourier transform (IDFT) or like processing to effect an Inverse Fourier Transform.
  • IDFT inverse discrete Fourier transform
  • Each of the resultant signals is up-converted in the digital domain to an intermediate frequency and converted to an analog signal via the corresponding digital up-conversion (DUC) circuitry 64 and digital-to-analog (D/A) conversion circuitry 66 .
  • the resultant analog signals are then simultaneously modulated at the desired RF frequency, amplified, and transmitted via RF circuitry 68 and antenna(s) 40 .
  • the transmitted data may include pilot signals, which were previously assigned by the base station 14 .
  • the base station 14 which is discussed in detail below, may use the pilot signals for channel estimation and interference suppression, as well as to identify the mobile terminal 16 .
  • FIG. 5 illustrate reception of the transmitted signals by a base station 14 .
  • the respective signals are demodulated and amplified by corresponding RF circuitry 74 .
  • Analog-to-digital (A/D) conversion and downconversion circuitry (DCC) 76 digitizes and downconverts the analog signal for digital processing.
  • the resultant digitized signal may be used by automatic gain control circuitry (AGC) 78 to control the gain of the amplifiers in the RF circuitry 74 based on the received signal level.
  • AGC automatic gain control circuitry
  • the digitized signal is also fed to synchronization circuitry 80 and a multiple access demodulation function 82 , which will recover the incoming signal received at a corresponding antenna 28 at each receiver path.
  • the synchronization circuitry 80 facilitates alignment or correlation of the incoming signal with the multiple access demodulation function 82 to aid recovery of the incoming signal, which is provided to a signaling processing function 84 and channel estimation function 86 .
  • the signal processing function 84 processes basic signaling and header information to provide information sufficient to generate a channel quality measurement, which may bear on an overall signal-to-noise ratio for the link, taking into account channel conditions and/or signal-to-noise ratios for each receive path.
  • the channel estimation function 86 for each receive path provides channel responses corresponding to channel conditions for use by a diversity decoder 88 .
  • the symbols from the incoming signal and channel estimates for each receive path are provided to the diversity decoder 88 .
  • the channel estimates provide sufficient channel response information to allow the diversity decoder 88 to decode the symbols according to the transmission and/or encoding used by the mobile terminal 16 .
  • the recovered symbols are placed back in order using symbol de-interleaver logic 90 , which corresponds to the symbol interleaver logic 58 of the base station 14 .
  • the de-interleaved symbols are then demodulated or de-mapped to a corresponding bitstream using de-mapping logic 92 .
  • combiner logic 94 such as a Chase combiner, which is well known in the art, may optionally be included to combine the energy associated with parallel receive channels to arrive at a soft decision for each bit or group of bits.
  • the bits are then de-interleaved using bit de-interleaver logic 96 , which corresponds to the bit interleaver logic 54 of the transmitter architecture.
  • CRC logic 102 removes the CRC checksum, checks the scrambled data in traditional fashion, and provides it to de-scrambling logic 104 for de-scrambling using the known base station de-scrambling code to recover the originally transmitted data 106 .
  • a channel quality indicator may be determined based on the recovered data.
  • An additional or alternative CQI function 108 may be provided anywhere along the data recovery path (blocks 90 through 106 ) to monitor signal-to-noise ratios, error rates, and like to derive information bearing on individual or overall channel quality. Additional information on one exemplary way to determine a CQI value is provided in co-assigned application Ser. No. 60/329,511, filed Oct. 17, 2001, which is incorporated herein by reference in its entirety.
  • FIG. 6 an existing multiple input multiple output (MIMO) transmission scheme of an existing Nortel Networks Limited OFDM architecture is illustrated.
  • a mobile terminal 16 has two transmission paths leading to two antennas 40 , which will transmit signals to the antennas 28 of the base station 14 .
  • FIG. 6 illustrates two transmission techniques. The first uses space-time transmit diversity (coding), while the second uses BLAST or like parallel transmission technique. In both techniques, a block of OFDM sub-carriers in the time-frequency domain is allocated to a single mobile terminal 16 at any given time. Within this block of sub-carriers, certain sub-carriers will be used as pilots, while others are used to transmit data.
  • the pilot information is represented as P x , which represents pilot data capable of being processed to provide a conjugate T x * and a negative complex conjugate ⁇ P x * .
  • data for transmission by a data sub-carrier can be represented as the actual data S x , a complex conjugate S x * , or a negative complex conjugate ⁇ S x * .
  • Data, conjugates, and negative complex conjugates are used for space-time transmit diversity coding, as will be recognized by those skilled in the art.
  • the base station 14 will assign different pilot information P 1 , P 2 and corresponding sub-carriers for transmitting the pilot information to the mobile terminal 16 .
  • STTD coding is implemented across each of the transmission paths in the mobile terminal 16 .
  • the pilot information is processed and provided in the sub-carriers assigned by the base station 14 for the group of sub-carriers, as illustrated.
  • any data to be transmitted to the base station 14 from the mobile terminal 16 is provided in all or select ones of the remaining sub-carriers in the group of sub-carriers using STTD coding wherein redundant versions of the data are coded and transmitted from the different antennas 40 of the mobile terminal 16 , or using the BLAST technique wherein each antenna 40 transmits different data.
  • STTD and BLAST techniques are provided in U.S. patent application Ser. No. 09/977,540 filed Oct. 15, 2001, Ser. No. 10/251,935 filed Sep. 20, 2002, Ser. No. 10/261,739 filed Oct. 1, 2002, and Ser. No. 10/263,268 filed Oct. 2, 2002, the disclosures of which are incorporated herein by reference in their entireties.
  • Providing a MIMO architecture with mobile terminals 16 having multiple transmit paths can increase channel capacity by allowing multiple users to share the same channels, increase data rates, or a combination thereof.
  • equipping mobile terminals 16 with multiple transmission paths significantly increases the cost and complexity of the mobile terminals 16 .
  • the present invention provides a way for mobile terminals 16 with a single transmission path to cooperate with one another under the control of the base station 14 to provide a virtual MIMO environment.
  • this virtual MIMO environment can readily involve mobile terminals 16 having multiple transmission paths and antennas.
  • the base station 14 identifies a sub-set of N mobile terminals 16 to cooperate with one another during uplink transmissions (block 200 ).
  • the base station 14 will assign shared resources to each of the cooperating mobile terminals 16 via downlink channels (block 202 ).
  • the shared resources will include a common sub-carrier block, which is the group of sub-carriers in the time-frequency domain that the mobile terminal 16 will use for transmission.
  • Each of the cooperating mobile terminals 16 will transmit information using the common sub-carrier block at the same time.
  • the base station 14 will assign common spreading and scrambling codes for each of the cooperating mobile terminals 16 to use for transmission of data during a defined period or slot.
  • the base station 14 will assign user-specific resources to the individual mobile terminals 16 in the group via the downlink channels (block 204 ).
  • the user-specific resources are the pilot sub-carriers within the shared sub-carrier block.
  • the user-specific resource is a unique pilot PN code, used for scrambling or spreading the information to be transmitted.
  • each mobile terminal 16 in the cooperating group will transmit data to the base station 14 in synchronized time slots using the shared resources and user-specific pilots (block 206 ).
  • the base station 14 will receive the transmitted signals from the mobile terminals 16 at each of its M antennas 40 (block 208 ) and extract the pilot signals for each of the mobile terminals 16 to help identify the mobile terminals 16 transmitting information, as well as estimate the channel conditions for the MIMO channel (block 210 ). Finally, the base station 14 will decode the received signals to extract the data or information transmitted by each of the cooperating mobile terminals 16 (block 212 ).
  • FIGS. 8A and 8B a communication environment having two mobile terminals 16 , referred to as user elements 1 and 2 (UE 1 and UE 2 ), is provided.
  • each of the mobile terminals UE 1 and UE 2 transmits information via the same sub-carrier group at the same time.
  • Each mobile terminal UE 1 and UE 2 will transmit its own data, yet will use pilot information provided by the base station 14 to provide a virtual MIMO environment.
  • UE 1 and UE 2 will emulate a single user element having two transmission paths and two antennas 40 , by transmitting data over the same group of sub-carriers and careful use of pilot placement.
  • the illustrated sub-carrier block includes ten sub-carriers over two time periods for a total of twenty allocated sub-carriers.
  • the sub-carriers on the ends are reserved for pilot information, and as such, during the first time period mobile terminal UE 2 may provide pilot data P 1 in the rightmost sub-carrier, while mobile terminal UE 1 will provide the same pilot data P 1 in the leftmost sub-carrier. For the next time period, mobile terminal UE 2 will provide pilot data P 2 in the leftmost sub-carrier, while mobile terminal UE 1 provides the pilot data P 2 in the rightmost sub-carrier.
  • the pilot information provided by both of the mobile terminals UE 1 and UE 2 do not interfere with one another, and provide the necessary pilot information to allow decoding of the transmitted information as if it were simultaneously transmitted from a single mobile terminal 16 having multiple transmission paths and antennas 40 .
  • FIG. 8B illustrates a more complex configuration wherein STTD coding is used for the pilot sub-carriers and the sub-carrier group.
  • Use of the STTD coding increases the robustness of the pilot information and increases the likelihood of a proper recognition of the information by the base station 14 .
  • the remaining sub-carriers can be used to transmit data for the respective mobile terminals UE 1 and UE 2 at the same time.
  • the base station 14 will use the necessary diversity of the coding logic to recover the transmitted data and recognize from where the data was transmitted in traditional fashion, as if it were simultaneously transmitted from a MIMO-equipped mobile terminal 16 .
  • FIGS. 9A and 9B illustrate an OFDM environment wherein four mobile terminals 16 , UE 1 -UE 4 , are identified by the base station 14 to cooperate with one another to provide a virtual MIMO environment.
  • FIG. 9A depicts the use of basic pilot information P 1 -P 4 for use over eight sub-carriers in the identified group of sub-carriers.
  • FIG. 9B illustrates an embodiment wherein the pilot information is encoded using STTD.
  • FIGS. 10A and 10B illustrate an environment wherein mobile terminal UE 1 is MIMO compliant in that it has two transmission paths and antennas 40 , and is assigned to cooperate with mobile terminals UE 2 and UE 3 to provide a virtual MIMO environment corresponding to four transmission paths and four antennas 40 .
  • FIG. 10A illustrates basic pilot information assignment
  • FIG. 10B uses STTD coding for the pilot information.
  • the present invention is applicable to many multiple access environments, including CDMA, and preferably synchronous CDMA.
  • different spreading or scrambling codes are used to define shared and user-specific resources.
  • a given mobile terminal 16 may support numerous sub-channels for transmitting data 106 within the CDMA infrastructure, wherein each sub-channel is defined with a unique sub-channel PN code, ⁇ x .
  • the shared resources include spreading codes for each of the sub-channels C x , wherein the corresponding sub-channels in each mobile terminal 16 have the same spreading code.
  • the overall scrambling code for all of the sub-channels for a given mobile terminal 16 is the same for all of the mobile terminals 16 in the group.
  • the shared resources are the spreading and scrambling codes.
  • the user-specific resource is again related to the pilot signal, wherein each mobile terminal 16 in the group will be assigned a unique pilot code, PN k , which will be used in some fashion to spread all or a portion of the signal to be transmitted.
  • the data 106 for sub-channels 1 ⁇ m are successively spread by spreading codes C 1 -C m and ⁇ 1 - ⁇ m and added together to form an in-phase signal (I).
  • the data 106 for sub-channels m+1 through n are successively spread by spreading codes C m+1 through C n and ⁇ m+1 through ⁇ n , and added to a pilot code to form a quadrature phase signal (Q).
  • the quadrature phase signal is shifted 90 degrees (j) and added with the in-phase signal (I) before being scrambled by a scrambling code PN 1 +jPN 2 .
  • the data spreading and scrambling codes are common within the group of mobile terminals, and the transmitted signals vary from each other due to the incorporation of the pilot code PN k .
  • each of the mobile terminals 16 transmits only its own data, although the data may be encoded in any number of ways.
  • the mobile terminals 16 within a cooperating group of mobile terminals 16 are capable of transmitting their data directly between each other and use various encoding techniques to transmit data to the base stations 14 .
  • the data transmitted from any given mobile terminal 16 to a base station 14 may include data corresponding to the mobile terminal 16 transmitting the data or data received from another mobile terminal 16 in the group of mobile terminals 16 .
  • FIG. 12 A basic overview of the process is provided in FIG. 12 .
  • the base station 14 will identify a sub-set of mobile terminals 16 that will cooperate with one another to provide uplink transmission to implement a virtual MIMO environment (block 300 ). Preferably, STTD encoding will be used for the uplink transmission.
  • the base station 14 will assign shared resources and relay slots to the cooperating mobile terminals 16 via downlink channels (block 302 ).
  • the relay slots are time periods in which the mobile terminals 16 can transmit their information to other mobile terminals 16 in the group.
  • the shared resources for OFDM may be a sub-carrier block defining the group of sub-carriers in a time-frequency domain, wherein CDMA shared resources are preferably spreading and scrambling codes used to spread and scramble the data to be transmitted.
  • the base station 14 will then assign user-specific resources to the individual mobile terminals 16 in the group via downlink channels (block 304 ).
  • the user-specific resources identify pilot information and sub-carriers in the assigned sub-carrier block for an OFDM configuration, or pilot scrambling or spreading PN codes for a CDMA environment.
  • the cooperating mobile terminals 16 will relay data to each other (block 306 ).
  • the mobile terminals 16 will then encode the data in a defined manner, preferably using STTD coding, and transmit the joint, STTD coded data to the base station 14 in synchronized time slots (block 308 ).
  • the base station 14 will receive the signals from the cooperating mobile terminals 16 from the M antennas 28 (block 310 ), extract the pilot signals, estimate the MIMO channels (block 312 ), and perform STTD decoding to extract the information transmitted from the cooperating mobile terminals 16 (block 314 ).
  • the transmission of data is encoded and transmitted to the base stations 14 , which are able to decode the transmitted data and associate the data with the mobile terminal 16 at which it originated. This can be done because the base station 14 controls how the information is relayed and transmitted from the various mobile terminals 16 , and will essentially reverse the process upon transmission by the mobile terminal 16 .
  • the relaying of information between the mobile terminals 16 can be accomplished in many ways.
  • the information can be relayed between mobile terminals 16 using the same resources used to facilitate communications between the mobile terminal 16 and the base station 14 (in-band) or using resources other than those required for communications between the base station 14 and the mobile terminal 16 (out-of-band).
  • the mobile terminals 16 are preferably configured to directly communicate with one another in a manner scheduled by the base station 14 .
  • An exemplary out-of-band configuration is depicted in FIG.
  • FIGS. 13B and 13C illustrate one exemplary relay procedure for out-of-band embodiments.
  • the mobile terminals 16 will be assigned a given time slot for transmitting data to some or all of the mobile terminals 16 in the group. For example, during a first time slot, user element 1 will transmit (Tx) its data to be shared to the other mobile terminals 16 , user element 2 through user element 9 . During a second time slot, user element 2 will transmit its data to be shared to the other mobile terminals, user element 1 and user elements 3 - 9 , which will receive (Rx) the information and process it accordingly for subsequent transmission in a direct or encoded form to the base station 14 .
  • FIG. 14 illustrates an in-band embodiment, wherein the same resources used for communications between the base station 14 and the mobile terminals 16 are used to relay data directly between the mobile terminals 16 .
  • the resources for relaying information and uplink communications from the mobile terminal 16 to the base station 14 share the same resources. Accordingly, the resources are divided into relay time slots and uplink time slots.
  • mobile terminal UE 1 will transmit to all the other mobile terminals 16 (UE 2 -UE 9 ).
  • all of the mobile terminals 16 (UE 1 -UE 9 ) will transmit data to the base station 14 .
  • another mobile terminal 16 (UE 2 ) will transmit all or select data to the other mobile terminals 16 (UE 1 , UE 3 -UE 9 ), and the process will continue such that the mobile terminals 16 will transmit data between each other during relay time slots and transmit data to the base station 14 during uplink transmit time slots.
  • the uplink transmit and relay time slots will likely be subdivided into further time slots for corresponding transmissions to other mobile terminals 16 or the base station 14 , as the case may be.
  • FIGS. 15-17 illustrate when information is relayed and how that information may be encoded by the various mobile terminals 16 to provide for virtual, STTD MIMO transmissions.
  • mobile terminal UE 1 and mobile terminal UE 2 relay their information to each other, and during the subsequent two uplink transmission time slots, mobile terminal UE 1 and mobile terminal UE 2 will transmit STTD encoded versions of both of their data to the base station 14 .
  • UE 1 during a first uplink transmission time slot will transmit S 2 (1) , which represents unencoded data from mobile terminal UE 2
  • mobile terminal UE 2 will transmit the complex conjugate, S 1 *(2) of mobile terminal UE 1 's data, S 1 .
  • mobile terminal UE 1 will transmit its data S 1 (1)
  • mobile terminal UE 2 will transmit the negative complex conjugate of its data, ⁇ S 2 *(2) , and the process continues.
  • FIGS. 16 and 17 illustrate third and fourth order transmit diversity schemes wherein the relay time slots for each given mobile terminal 16 are not necessarily co-aligned, such that certain mobile terminals 16 may be transmitting to the base station 14 using certain resources and other mobile terminals 16 are relaying data to each other using other resources.
  • the present invention provides an effective way to create a virtual MIMO transmission system using mobile terminals 16 that have only one transmit path and antenna 40 .
  • This is accomplished by assigning mobile terminals 16 to a group and assigning certain shared resources and user-specific resources to those mobile terminals 16 in the group.
  • the mobile terminals 16 will provide uplink transmission in concert, as if they were a single entity having multiple transmission paths and antennas.
  • the shared resources bear on how the data is transmitted, and the user-specific resources relate to pilot signals.
  • the data transmitted may be encoded in any number of ways, and in one embodiment, the mobile terminals 16 may relay their information to each other, such that uplink transmissions can incorporate STTD decoding or other space-time codes.
  • the invention is applicable to virtually any multiple access technology, including OFDM, TDMA, and CDMA, preferably synchronous CDMA.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
US10/321,999 2002-12-16 2002-12-16 Virtual mimo communication system Active 2025-11-26 US7508798B2 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US10/321,999 US7508798B2 (en) 2002-12-16 2002-12-16 Virtual mimo communication system
AU2003285626A AU2003285626A1 (en) 2002-12-16 2003-12-15 Communication system with uplink space-time coding via coordinated mobile terminals
KR1020057010955A KR101033104B1 (ko) 2002-12-16 2003-12-15 조정된 모바일 터미널들을 통한 업링크 공간-시간 코딩기능을 갖는 통신 시스템
EP03778621A EP1576756A2 (fr) 2002-12-16 2003-12-15 Systeme de communication mimo virtuel
CN201210216232.1A CN102938667B (zh) 2002-12-16 2003-12-15 带有经协调的移动终端的上行链路空-时编码的通信系统
CN2003801097447A CN1748383B (zh) 2002-12-16 2003-12-15 带有经协调的移动终端的上行链路空-时编码的通信系统
EP07120063.8A EP1890415B1 (fr) 2002-12-16 2003-12-15 Système de communication avec codage spatio-temporel de liaison montante via des terminaux mobiles coordonnés
EP10183982.7A EP2363969B1 (fr) 2002-12-16 2003-12-15 Système de communication avec codage spatio-temporel de liaison montante via des terminaux mobiles coordonnés
PCT/IB2003/005947 WO2004056029A2 (fr) 2002-12-16 2003-12-15 Systeme de communication mimo virtuel
EP10183976A EP2365656A1 (fr) 2002-12-16 2003-12-15 Système de communication MIMO virtuel
HK08106645.8A HK1112546A1 (zh) 2002-12-16 2008-06-17 帶有經協調的移動終端的上行鏈路時空編碼的通訊系統

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/321,999 US7508798B2 (en) 2002-12-16 2002-12-16 Virtual mimo communication system

Publications (2)

Publication Number Publication Date
US20040114618A1 US20040114618A1 (en) 2004-06-17
US7508798B2 true US7508798B2 (en) 2009-03-24

Family

ID=32507182

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/321,999 Active 2025-11-26 US7508798B2 (en) 2002-12-16 2002-12-16 Virtual mimo communication system

Country Status (7)

Country Link
US (1) US7508798B2 (fr)
EP (4) EP2365656A1 (fr)
KR (1) KR101033104B1 (fr)
CN (2) CN1748383B (fr)
AU (1) AU2003285626A1 (fr)
HK (1) HK1112546A1 (fr)
WO (1) WO2004056029A2 (fr)

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040258026A1 (en) * 2003-06-19 2004-12-23 Lau Kin Nang Method of uplink scheduling for multiple antenna systems
US20070218889A1 (en) * 2004-06-24 2007-09-20 Nortel Networks Limited Efficient Location Updates, Paging and Short Bursts
US20080043711A1 (en) * 2006-08-18 2008-02-21 Fujitsu Limited Communication Systems
US20080043712A1 (en) * 2006-08-18 2008-02-21 Fujitsu Limited Communication Systems
US20080076433A1 (en) * 2006-09-27 2008-03-27 Samsung Electronics Co. Ltd. System and method to transmit/receive signal in a mobile communication system
US20080075033A1 (en) * 2000-11-22 2008-03-27 Shattil Steve J Cooperative beam-forming in wireless networks
US20080205333A1 (en) * 2007-02-28 2008-08-28 Qualcomm Incorporated Uplink scheduling for fairness in channel estimation performance
US20090067382A1 (en) * 2007-09-06 2009-03-12 Qualcomm Incorporated Methods and apparatus for improved utilization of air link resources in a wireless communications system including a multi-antenna element base station
US20090135933A1 (en) * 2004-03-11 2009-05-28 Panasonic Corporation Communication terminal device and communication relay method
US20100074350A1 (en) * 2006-11-06 2010-03-25 Qualcomm Incorporated Codeword level scrambling for mimo transmission
US20120028570A1 (en) * 2008-08-18 2012-02-02 Sumei Sun Analog space-time relay method and apparatus for a wireless communication relay channel
US20130070628A1 (en) * 2006-01-30 2013-03-21 Motorola Mobility Llc System and method for allocating sub-channels in a network
US20150023202A1 (en) * 2002-05-14 2015-01-22 Genghiscomm Holdings, LLC Cooperative Wireless Networks
US8942082B2 (en) 2002-05-14 2015-01-27 Genghiscomm Holdings, LLC Cooperative subspace multiplexing in content delivery networks
US9225471B2 (en) 2002-05-14 2015-12-29 Genghiscomm Holdings, LLC Cooperative subspace multiplexing in communication networks
US9270421B2 (en) 2002-05-14 2016-02-23 Genghiscomm Holdings, LLC Cooperative subspace demultiplexing in communication networks
US9282535B2 (en) 2004-10-15 2016-03-08 Apple Inc. Efficient location updates, paging and short bursts
US20160274240A1 (en) * 2015-03-20 2016-09-22 Qualcomm Incorporated Autonomous satellite automatic gain control
US9628231B2 (en) 2002-05-14 2017-04-18 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US9819449B2 (en) 2002-05-14 2017-11-14 Genghiscomm Holdings, LLC Cooperative subspace demultiplexing in content delivery networks
US9893774B2 (en) 2001-04-26 2018-02-13 Genghiscomm Holdings, LLC Cloud radio access network
US10142082B1 (en) 2002-05-14 2018-11-27 Genghiscomm Holdings, LLC Pre-coding in OFDM
US10200227B2 (en) 2002-05-14 2019-02-05 Genghiscomm Holdings, LLC Pre-coding in multi-user MIMO
US10355720B2 (en) 2001-04-26 2019-07-16 Genghiscomm Holdings, LLC Distributed software-defined radio
US10425135B2 (en) 2001-04-26 2019-09-24 Genghiscomm Holdings, LLC Coordinated multipoint systems
US10644916B1 (en) 2002-05-14 2020-05-05 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10880145B2 (en) 2019-01-25 2020-12-29 Genghiscomm Holdings, LLC Orthogonal multiple access and non-orthogonal multiple access
US10931338B2 (en) 2001-04-26 2021-02-23 Genghiscomm Holdings, LLC Coordinated multipoint systems
US11018918B1 (en) 2017-05-25 2021-05-25 Genghiscomm Holdings, LLC Peak-to-average-power reduction for OFDM multiple access
US11115160B2 (en) 2019-05-26 2021-09-07 Genghiscomm Holdings, LLC Non-orthogonal multiple access
US11184037B1 (en) 2004-08-02 2021-11-23 Genghiscomm Holdings, LLC Demodulating and decoding carrier interferometry signals
US11196603B2 (en) 2017-06-30 2021-12-07 Genghiscomm Holdings, LLC Efficient synthesis and analysis of OFDM and MIMO-OFDM signals
US11343823B2 (en) 2020-08-16 2022-05-24 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
US11381285B1 (en) 2004-08-02 2022-07-05 Genghiscomm Holdings, LLC Transmit pre-coding
US11552737B1 (en) 2004-08-02 2023-01-10 Genghiscomm Holdings, LLC Cooperative MIMO
US11804870B2 (en) 2004-01-29 2023-10-31 Neo Wireless Llc Channel probing signal for a broadband communication system
US11917604B2 (en) 2019-01-25 2024-02-27 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access

Families Citing this family (108)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US9130810B2 (en) 2000-09-13 2015-09-08 Qualcomm Incorporated OFDM communications methods and apparatus
US7042857B2 (en) 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
EP1621037A2 (fr) * 2003-05-06 2006-02-01 Siemens Aktiengesellschaft Procede de transmission de donnees
US8611283B2 (en) * 2004-01-28 2013-12-17 Qualcomm Incorporated Method and apparatus of using a single channel to provide acknowledgement and assignment messages
CN103516459B (zh) * 2004-03-15 2016-09-21 苹果公司 用于具有四根发射天线的ofdm系统的导频设计
US7630356B2 (en) 2004-04-05 2009-12-08 Nortel Networks Limited Methods for supporting MIMO transmission in OFDM applications
US8081967B2 (en) * 2004-04-26 2011-12-20 Intel Corporation Method to manage medium access for a mixed wireless network
JP4597193B2 (ja) * 2004-07-07 2010-12-15 サムスン エレクトロニクス カンパニー リミテッド 複数の送信アンテナを使用する広帯域無線接続通信システムにおけるパイロット信号を送信する装置及び方法
US9137822B2 (en) 2004-07-21 2015-09-15 Qualcomm Incorporated Efficient signaling over access channel
US9148256B2 (en) 2004-07-21 2015-09-29 Qualcomm Incorporated Performance based rank prediction for MIMO design
US8891349B2 (en) 2004-07-23 2014-11-18 Qualcomm Incorporated Method of optimizing portions of a frame
KR101029812B1 (ko) * 2004-10-18 2011-04-18 엘지전자 주식회사 Ｏｆｄｍ 또는 ｏｆｄｍａ 무선 통신 시스템에서 ｍｉｍｏ모드 및 퍼뮤테이션 타입 피드백 방법
US8831115B2 (en) * 2004-12-22 2014-09-09 Qualcomm Incorporated MC-CDMA multiplexing in an orthogonal uplink
KR20060096365A (ko) * 2005-03-04 2006-09-11 삼성전자주식회사 다중 사용자 다중입력 다중출력（ｍｕ－ｍｉｍｏ）통신시스템의 사용자 스케줄링 방법
US9246560B2 (en) 2005-03-10 2016-01-26 Qualcomm Incorporated Systems and methods for beamforming and rate control in a multi-input multi-output communication systems
US9154211B2 (en) 2005-03-11 2015-10-06 Qualcomm Incorporated Systems and methods for beamforming feedback in multi antenna communication systems
US8446892B2 (en) 2005-03-16 2013-05-21 Qualcomm Incorporated Channel structures for a quasi-orthogonal multiple-access communication system
US9461859B2 (en) 2005-03-17 2016-10-04 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9520972B2 (en) 2005-03-17 2016-12-13 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9143305B2 (en) 2005-03-17 2015-09-22 Qualcomm Incorporated Pilot signal transmission for an orthogonal frequency division wireless communication system
US9184870B2 (en) 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
FR2884085B1 (fr) * 2005-04-01 2014-08-15 Thales Sa Dispositif et procede pour accroitre la robustesse ou la capacite des systemes de communication sans fil
US9036538B2 (en) 2005-04-19 2015-05-19 Qualcomm Incorporated Frequency hopping design for single carrier FDMA systems
US9408220B2 (en) 2005-04-19 2016-08-02 Qualcomm Incorporated Channel quality reporting for adaptive sectorization
US8611284B2 (en) 2005-05-31 2013-12-17 Qualcomm Incorporated Use of supplemental assignments to decrement resources
US8565194B2 (en) 2005-10-27 2013-10-22 Qualcomm Incorporated Puncturing signaling channel for a wireless communication system
US8879511B2 (en) 2005-10-27 2014-11-04 Qualcomm Incorporated Assignment acknowledgement for a wireless communication system
US8462859B2 (en) 2005-06-01 2013-06-11 Qualcomm Incorporated Sphere decoding apparatus
US8599945B2 (en) 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US9179319B2 (en) 2005-06-16 2015-11-03 Qualcomm Incorporated Adaptive sectorization in cellular systems
US7406060B2 (en) * 2005-07-06 2008-07-29 Nortel Networks Limited Coverage improvement in wireless systems with fixed infrastructure based relays
US8885628B2 (en) 2005-08-08 2014-11-11 Qualcomm Incorporated Code division multiplexing in a single-carrier frequency division multiple access system
CN101278497B (zh) * 2005-08-19 2013-06-12 韩国电子通信研究院 用于正交频分复用系统和基于正交频分复用的蜂窝系统的虚拟多天线方法
US20070041457A1 (en) 2005-08-22 2007-02-22 Tamer Kadous Method and apparatus for providing antenna diversity in a wireless communication system
US9209956B2 (en) 2005-08-22 2015-12-08 Qualcomm Incorporated Segment sensitive scheduling
US8644292B2 (en) 2005-08-24 2014-02-04 Qualcomm Incorporated Varied transmission time intervals for wireless communication system
US9136974B2 (en) 2005-08-30 2015-09-15 Qualcomm Incorporated Precoding and SDMA support
US20070076649A1 (en) * 2005-09-30 2007-04-05 Intel Corporation Techniques for heterogeneous radio cooperation
EP2858264B1 (fr) 2005-09-30 2019-12-18 Apple Inc. Système de communication mimo
US9088384B2 (en) 2005-10-27 2015-07-21 Qualcomm Incorporated Pilot symbol transmission in wireless communication systems
US8477684B2 (en) 2005-10-27 2013-07-02 Qualcomm Incorporated Acknowledgement of control messages in a wireless communication system
US9144060B2 (en) 2005-10-27 2015-09-22 Qualcomm Incorporated Resource allocation for shared signaling channels
US9210651B2 (en) 2005-10-27 2015-12-08 Qualcomm Incorporated Method and apparatus for bootstraping information in a communication system
US9172453B2 (en) 2005-10-27 2015-10-27 Qualcomm Incorporated Method and apparatus for pre-coding frequency division duplexing system
US8693405B2 (en) 2005-10-27 2014-04-08 Qualcomm Incorporated SDMA resource management
US8582509B2 (en) 2005-10-27 2013-11-12 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9225416B2 (en) * 2005-10-27 2015-12-29 Qualcomm Incorporated Varied signaling channels for a reverse link in a wireless communication system
US8045512B2 (en) 2005-10-27 2011-10-25 Qualcomm Incorporated Scalable frequency band operation in wireless communication systems
US9225488B2 (en) 2005-10-27 2015-12-29 Qualcomm Incorporated Shared signaling channel
US8582548B2 (en) 2005-11-18 2013-11-12 Qualcomm Incorporated Frequency division multiple access schemes for wireless communication
TWI422178B (zh) * 2005-12-06 2014-01-01 Lg Electronics Inc 於多天線系統中傳輸訊號之方法
US7965687B2 (en) * 2005-12-15 2011-06-21 Sasken Communications Technologies Method and system for multiple-input-multiple-output (MIMO) communication in a wireless network
US8831607B2 (en) 2006-01-05 2014-09-09 Qualcomm Incorporated Reverse link other sector communication
US7940640B2 (en) * 2006-01-20 2011-05-10 Nortel Networks Limited Adaptive orthogonal scheduling for virtual MIMO system
US8331425B2 (en) * 2006-02-28 2012-12-11 Kyocera Corporation Apparatus, system and method for providing a multiple input/multiple output (MIMO) channel interface
CN101352056B (zh) * 2006-03-03 2012-08-08 中兴通讯股份有限公司 一种集群系统中的载频指配方法
US8914015B2 (en) * 2006-03-20 2014-12-16 Qualcomm Incorporated Grouping of users for MIMO transmission in a wireless communication system
US9806785B2 (en) * 2006-04-28 2017-10-31 Apple Inc. Rank adaptive transmission methods and apparatuses
US8743676B2 (en) 2006-05-10 2014-06-03 Apple Inc. Methods and systems for scheduling OFDM frames
EP2057758B1 (fr) * 2006-08-22 2017-05-03 Apple Inc. Systeme et procede de programmation multi antenne
WO2008025040A2 (fr) 2006-08-25 2008-02-28 Qualcomm Incorporated Systèmes de communication sans fil cdma
CN101141165A (zh) 2006-09-05 2008-03-12 华为技术有限公司 实现发射及接收分集的系统及方法
US8335196B2 (en) * 2006-09-19 2012-12-18 Qualcomm Incorporated Accommodating wideband and narrowband communication devices
EP1919102A1 (fr) * 2006-10-30 2008-05-07 Mitsubishi Electric Information Technology Centre Europe B.V. Méthode de transmission dans un système TDD avec période de garde de longueur variable
KR100826518B1 (ko) * 2006-12-07 2008-04-30 한국전자통신연구원 방송 시스템에서 상조형 전송 방식을 이용한 역방향 데이터 전송 방법과 그를 위한 역방향 데이터 전송 관리 방법
CN101232319B (zh) * 2007-01-23 2012-07-25 上海贝尔阿尔卡特股份有限公司 一种基于中继的无线网络的中继设备中信号上行传输方法
US8005164B2 (en) * 2007-03-02 2011-08-23 Intel Corporation Link adaptation and antenna selection in cooperative multiple access systems
WO2008112454A1 (fr) * 2007-03-13 2008-09-18 The Regents Of The University Of California Systèmes multisignaux avec chemin partagé modulés en code
CN101272175B (zh) * 2007-03-21 2013-02-13 电信科学技术研究院 时分双工ofdma系统上行控制信令传输方法与装置
CN101047474B (zh) * 2007-04-10 2010-06-02 杭州电子科技大学 一种结合mimo技术的td-scdma上行链路方法
KR101321295B1 (ko) * 2007-04-10 2013-10-25 엘지전자 주식회사 다중안테나 시스템의 데이터 전송 방법
CN101669301B (zh) * 2007-05-10 2012-12-05 上海贝尔阿尔卡特股份有限公司 无线通信系统上行链路传输调度方法和相关设备
WO2008140268A2 (fr) * 2007-05-16 2008-11-20 Posdata Co., Ltd. Appareil et procédé de traitement de mimo collaborative
KR100905279B1 (ko) 2007-05-16 2009-06-30 포스데이타 주식회사 협력 다중입출력을 위한 데이터 전송 방법 및 장치
KR100945098B1 (ko) * 2007-06-19 2010-03-02 주식회사 포스코아이씨티 무선통신 시스템에서 ｃ-ｍｉｍｏ를 지원하기 위한 방법 및장치
CN101836369A (zh) 2007-08-27 2010-09-15 北方电讯网络有限公司 使用基于mimo的网络编码的通信系统
CN101388867B (zh) * 2007-09-11 2012-12-19 中兴通讯股份有限公司 一种基于正交频分复用系统的资源调度方法
US9974060B2 (en) * 2007-09-12 2018-05-15 Apple Inc. Systems and methods for uplink signalling
KR101445078B1 (ko) 2007-10-04 2014-11-03 삼성전자주식회사 릴레이 시스템 및 상기 릴레이 시스템을 위한 데이터프레임 구조
KR100924967B1 (ko) * 2007-10-30 2009-11-04 포스데이타 주식회사 무선 통신 시스템에서 ｃｍｉｍｏ를 지원하는 방법 및 장치
JP4591875B2 (ja) * 2007-12-25 2010-12-01 村田機械株式会社 中継サーバ及び中継通信システム
CN101217302B (zh) * 2008-01-18 2011-05-11 清华大学 多用户无线网络中基于空时分集编解码的协同通信方法
KR101597377B1 (ko) * 2008-04-28 2016-02-25 애플 인크. 업링크 ｖ-ｍｉｍｏ를 위한 후보 리스트 생성 방법 및 장치
EP2302855A4 (fr) * 2008-07-18 2012-10-03 Alcatel Lucent Procédés et dispositifs destinés au traitement de commutation pour des signaux de sous-canaux multiples dans un système sc-fdma
KR101027233B1 (ko) * 2008-07-23 2011-04-06 엘지전자 주식회사 다중 안테나 시스템에서 참조신호 전송 방법
CN101635589B (zh) * 2008-07-24 2012-11-28 中兴通讯股份有限公司 导频处理方法
US20100061279A1 (en) * 2008-09-08 2010-03-11 Infineon Technologies Ag Transmitting and Receiving Wireless Signals Via Dual Antennas
WO2010056203A1 (fr) * 2008-11-14 2010-05-20 Agency For Science, Technology And Research Procédés et dispositifs de communication coopérative
CN101778390B (zh) * 2009-01-09 2014-07-16 中兴通讯股份有限公司 一种资源协作的方法及系统
CN101783722B (zh) * 2009-01-21 2013-09-18 普天信息技术研究院有限公司 一种虚拟mimo传输方法和装置
KR101719995B1 (ko) 2009-02-20 2017-03-27 엘지전자 주식회사 릴레이 방식의 통신 시스템에서 백홀 링크의 기준신호 할당 방법 및 이를 통한 데이터 송수신 방법 및 장치
BRPI0924442A2 (pt) * 2009-03-12 2016-01-26 Alcatel Lucent método para executar sincronização de conteudo para dados de serviço em enlace descendente em mimo colaborativo e aparelho do mesmo
CN101964676B (zh) * 2009-07-22 2014-04-09 中兴通讯股份有限公司 中继链路下行解调参考信号的发送方法、基站及中继站
US8767638B2 (en) * 2009-08-06 2014-07-01 Htc Corporation Method of handling resource assignment and related communication device
WO2012074326A2 (fr) * 2010-12-02 2012-06-07 엘지전자 주식회사 Procédé et appareil pour attribuer des ressources dans un système à nœuds multiples
EP2477343A1 (fr) * 2011-01-13 2012-07-18 Alcatel Lucent Groupe de coopération pour transmissions sans fil
JP5668979B2 (ja) * 2011-03-10 2015-02-12 ソニー株式会社 受信装置、受信方法、およびプログラム
US8867639B2 (en) * 2012-04-23 2014-10-21 Lg Electronics Inc. Feedback method for virtual MIMO transmission in wireless ad-hoc communication system
CN104219021A (zh) 2013-05-31 2014-12-17 中兴通讯股份有限公司 一种下行虚拟多天线系统的数据传输方法、装置及系统
CN104426866B (zh) * 2013-08-28 2018-12-14 华为技术有限公司 一种数据传输方法及装置
WO2017113113A1 (fr) * 2015-12-29 2017-07-06 华为技术有限公司 Dispositif terminal, dispositif de réseau, procédé de transmission de données et système de communication sans fil
CN105763298B (zh) * 2016-02-05 2019-02-19 中国矿业大学 一种井下协作mimo系统通信模型建立方法
CN105978665A (zh) * 2016-04-19 2016-09-28 乐视控股（北京）有限公司 信息传输方法、装置和系统
GB2565269A (en) * 2017-06-30 2019-02-13 Tcl Communication Ltd Relay operations in a cellular network
CN109819691B (zh) * 2017-09-25 2022-06-24 北京小米移动软件有限公司 无线链路监测方法及装置和指示接收方法及装置
CN110176977B (zh) * 2019-05-20 2022-07-05 北京遥测技术研究所 Ofdm数据链中基于agc的高阶qam软判决方法
US12120632B2 (en) 2022-10-18 2024-10-15 International Business Machines Corporation Dynamic massive MIMO end device pairing based on predicted and real time connection state

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016311A (en) * 1997-11-19 2000-01-18 Ensemble Communications, Inc. Adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within a wireless communication system
EP0993129A2 (fr) 1998-10-07 2000-04-12 Texas Instruments Incorporated Estimation de canal dans une diversité d'émission codée par blocs spatials-temporels pour WCDMA
US20020146060A1 (en) 2000-10-27 2002-10-10 Ertel Richard B. Code assignment algorithm for synchronous DS-CDMA links with SDMA using estimated spatial signature vectors
US6473467B1 (en) * 2000-03-22 2002-10-29 Qualcomm Incorporated Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system
WO2002091597A2 (fr) 2001-05-03 2002-11-14 Qualcomm Incorporated Procede et dispositif de commande pour transmissions ascendantes dans un systeme de communication sans fil
US20020177447A1 (en) 2001-05-16 2002-11-28 Walton Jay Rod Method and apparatus for allocating uplink resources in a multiple-input multiple-output (MIMO) communication system
EP1265376A2 (fr) 2001-06-04 2002-12-11 Lucent Technologies Inc. Procede pour emission sur antennes multiples
US20030223516A1 (en) * 2002-05-28 2003-12-04 Xinying Zhang Sequential bezout space-time equalizers for MIMO systems
US6662024B2 (en) * 2001-05-16 2003-12-09 Qualcomm Incorporated Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system
US6724813B1 (en) * 1998-10-14 2004-04-20 Telefonaktiebolaget Lm Ericsson (Publ) Implicit resource allocation in a communication system
US6741587B2 (en) * 2002-04-02 2004-05-25 Nokia Corporation Inter-frequency measurements with MIMO terminals
US20050002467A1 (en) * 2003-05-15 2005-01-06 Dong-Youn Seo Method and apparatus for allocating channelization codes for wireless communications
US6859503B2 (en) * 2001-04-07 2005-02-22 Motorola, Inc. Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel
US6928062B2 (en) * 2002-10-29 2005-08-09 Qualcomm, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US6958989B1 (en) * 1999-05-19 2005-10-25 Interdigital Technology Corporation Uplink scrambling code assignment for a random access channel
US6985434B2 (en) * 2000-09-01 2006-01-10 Nortel Networks Limited Adaptive time diversity and spatial diversity for OFDM
US7020110B2 (en) * 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
US7095709B2 (en) * 2002-06-24 2006-08-22 Qualcomm, Incorporated Diversity transmission modes for MIMO OFDM communication systems
US7095722B1 (en) * 1999-10-18 2006-08-22 Koninklijke Philips Electronics N.V. Method for the operation of wireless base stations for packet transfer radio systems having a guaranteed service quality
US7164649B2 (en) * 2001-11-02 2007-01-16 Qualcomm, Incorporated Adaptive rate control for OFDM communication system
US7299070B2 (en) * 2004-08-13 2007-11-20 Broadcom Corporation Dynamic MIMO resource allocation during a single communication
US7328025B2 (en) * 2001-01-29 2008-02-05 Mitsubishi Denki Kabushiki Kaisha Method for implicit allocation of resources
US7394860B2 (en) * 2002-10-02 2008-07-01 Nortel Networks Limited Combined space-time decoding
US7397864B2 (en) * 2002-09-20 2008-07-08 Nortel Networks Limited Incremental redundancy with space-time codes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6067290A (en) 1999-07-30 2000-05-23 Gigabit Wireless, Inc. Spatial multiplexing in a cellular network
EP1170897B1 (fr) * 2000-07-05 2020-01-15 Wi-Fi One Technologies International Limited Schéma de symboles pilotes pour un arrangement en STTD dans un système OFDM

Patent Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6016311A (en) * 1997-11-19 2000-01-18 Ensemble Communications, Inc. Adaptive time division duplexing method and apparatus for dynamic bandwidth allocation within a wireless communication system
EP0993129A2 (fr) 1998-10-07 2000-04-12 Texas Instruments Incorporated Estimation de canal dans une diversité d'émission codée par blocs spatials-temporels pour WCDMA
US6724813B1 (en) * 1998-10-14 2004-04-20 Telefonaktiebolaget Lm Ericsson (Publ) Implicit resource allocation in a communication system
US6958989B1 (en) * 1999-05-19 2005-10-25 Interdigital Technology Corporation Uplink scrambling code assignment for a random access channel
US7095722B1 (en) * 1999-10-18 2006-08-22 Koninklijke Philips Electronics N.V. Method for the operation of wireless base stations for packet transfer radio systems having a guaranteed service quality
US6473467B1 (en) * 2000-03-22 2002-10-29 Qualcomm Incorporated Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system
US6985434B2 (en) * 2000-09-01 2006-01-10 Nortel Networks Limited Adaptive time diversity and spatial diversity for OFDM
US20020146060A1 (en) 2000-10-27 2002-10-10 Ertel Richard B. Code assignment algorithm for synchronous DS-CDMA links with SDMA using estimated spatial signature vectors
US7328025B2 (en) * 2001-01-29 2008-02-05 Mitsubishi Denki Kabushiki Kaisha Method for implicit allocation of resources
US6859503B2 (en) * 2001-04-07 2005-02-22 Motorola, Inc. Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel
WO2002091597A2 (fr) 2001-05-03 2002-11-14 Qualcomm Incorporated Procede et dispositif de commande pour transmissions ascendantes dans un systeme de communication sans fil
US7042856B2 (en) * 2001-05-03 2006-05-09 Qualcomm, Incorporation Method and apparatus for controlling uplink transmissions of a wireless communication system
US7047016B2 (en) * 2001-05-16 2006-05-16 Qualcomm, Incorporated Method and apparatus for allocating uplink resources in a multiple-input multiple-output (MIMO) communication system
US20020177447A1 (en) 2001-05-16 2002-11-28 Walton Jay Rod Method and apparatus for allocating uplink resources in a multiple-input multiple-output (MIMO) communication system
US6662024B2 (en) * 2001-05-16 2003-12-09 Qualcomm Incorporated Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system
EP1265376A2 (fr) 2001-06-04 2002-12-11 Lucent Technologies Inc. Procede pour emission sur antennes multiples
US7164649B2 (en) * 2001-11-02 2007-01-16 Qualcomm, Incorporated Adaptive rate control for OFDM communication system
US7020110B2 (en) * 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
US6741587B2 (en) * 2002-04-02 2004-05-25 Nokia Corporation Inter-frequency measurements with MIMO terminals
US20030223516A1 (en) * 2002-05-28 2003-12-04 Xinying Zhang Sequential bezout space-time equalizers for MIMO systems
US7095709B2 (en) * 2002-06-24 2006-08-22 Qualcomm, Incorporated Diversity transmission modes for MIMO OFDM communication systems
US7397864B2 (en) * 2002-09-20 2008-07-08 Nortel Networks Limited Incremental redundancy with space-time codes
US7394860B2 (en) * 2002-10-02 2008-07-01 Nortel Networks Limited Combined space-time decoding
US6928062B2 (en) * 2002-10-29 2005-08-09 Qualcomm, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US20050002467A1 (en) * 2003-05-15 2005-01-06 Dong-Youn Seo Method and apparatus for allocating channelization codes for wireless communications
US7372912B2 (en) * 2003-05-15 2008-05-13 Lg Electronics Inc. Method and apparatus for allocating channelization codes for wireless communications
US7299070B2 (en) * 2004-08-13 2007-11-20 Broadcom Corporation Dynamic MIMO resource allocation during a single communication

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
Alamouti, Siavash M., "A Simple Transmit Diversity Technique for Wireless Communications," IEEE Journal on Selected Areas in Communications, vol. 16, No. 8, Oct. 1998, pp. 1451-1458, XP002100058.
Baltersee, Jens et al., "Achievable Rate of MIMO Channels With Data-Aided Channel Estimation and Perfect Interleaving," IEEE Journal on Selected Areas in Communications, vol. 19, No. 12, Dec. 2001, pp. 2358-2368, XP2359126A.
Garnier, C. et al., "Performance of an OFDM-SDMA based System in a Time-Varying Multi-Path Channel," 2001, p. 1686-1690.
International Search Report for PCT/IB 03/05947, mailed Jun. 25, 2004.
Laneman, J. Nicholas and Wornell, Gregory W., "Distributed Space-Time Coded Protocols for Exploiting Cooperative Diversity in Wireless Networks," IEEE Global Telecommunications Conference, Proceedings, Taipei, Taiwan, vol. 1 of 3, Nov. 2002, XP010635917.
Laneman, J. Nicholas, "Cooperative Diversity in Wireless Networks: Algorithms and Architectures," Massachusetts Institute of Technology, Boston, MA, Sep. 2002, http://allegro.mit.edu/pubs/posted/doctoral/2002-laneman-phd.pdf.
Vandenameele, Patrick et al., "A Combined OFDM/SDMA Approach," IEEE Journal on Selected Areas in Communications, vol. 18 No. 11, Nov. 2000.

Cited By (92)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8670390B2 (en) 2000-11-22 2014-03-11 Genghiscomm Holdings, LLC Cooperative beam-forming in wireless networks
US20080075033A1 (en) * 2000-11-22 2008-03-27 Shattil Steve J Cooperative beam-forming in wireless networks
US20090310586A1 (en) * 2000-11-22 2009-12-17 Steve Shatti Cooperative Wireless Networks
US8750264B2 (en) * 2000-11-22 2014-06-10 Genghiscomm Holdings, LLC Cooperative wireless networks
US11424792B2 (en) 2001-04-26 2022-08-23 Genghiscomm Holdings, LLC Coordinated multipoint systems
US10931338B2 (en) 2001-04-26 2021-02-23 Genghiscomm Holdings, LLC Coordinated multipoint systems
US10797733B1 (en) 2001-04-26 2020-10-06 Genghiscomm Holdings, LLC Distributed antenna systems
US10797732B1 (en) 2001-04-26 2020-10-06 Genghiscomm Holdings, LLC Distributed antenna systems
US10425135B2 (en) 2001-04-26 2019-09-24 Genghiscomm Holdings, LLC Coordinated multipoint systems
US10355720B2 (en) 2001-04-26 2019-07-16 Genghiscomm Holdings, LLC Distributed software-defined radio
US9893774B2 (en) 2001-04-26 2018-02-13 Genghiscomm Holdings, LLC Cloud radio access network
US9485063B2 (en) 2001-04-26 2016-11-01 Genghiscomm Holdings, LLC Pre-coding in multi-user MIMO
US10211892B2 (en) 2002-05-14 2019-02-19 Genghiscomm Holdings, LLC Spread-OFDM receiver
US9967007B2 (en) 2002-05-14 2018-05-08 Genghiscomm Holdings, LLC Cooperative wireless networks
US10574497B1 (en) 2002-05-14 2020-02-25 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10230559B1 (en) 2002-05-14 2019-03-12 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US11201644B2 (en) 2002-05-14 2021-12-14 Genghiscomm Holdings, LLC Cooperative wireless networks
US10200227B2 (en) 2002-05-14 2019-02-05 Genghiscomm Holdings, LLC Pre-coding in multi-user MIMO
US10142082B1 (en) 2002-05-14 2018-11-27 Genghiscomm Holdings, LLC Pre-coding in OFDM
US11025468B1 (en) 2002-05-14 2021-06-01 Genghiscomm Holdings, LLC Single carrier frequency division multiple access baseband signal generation
US11025312B2 (en) 2002-05-14 2021-06-01 Genghiscomm Holdings, LLC Blind-adaptive decoding of radio signals
US10903970B1 (en) 2002-05-14 2021-01-26 Genghiscomm Holdings, LLC Pre-coding in OFDM
US10038584B1 (en) 2002-05-14 2018-07-31 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US20150023202A1 (en) * 2002-05-14 2015-01-22 Genghiscomm Holdings, LLC Cooperative Wireless Networks
US8942082B2 (en) 2002-05-14 2015-01-27 Genghiscomm Holdings, LLC Cooperative subspace multiplexing in content delivery networks
US9042333B2 (en) 2002-05-14 2015-05-26 Genghiscomm Holdings, LLC Cooperative wireless networks
US9048897B2 (en) 2002-05-14 2015-06-02 Genghiscomm Holdings, LLC Cooperative wireless networks
US9136931B2 (en) * 2002-05-14 2015-09-15 Genghiscomm Holdings, LLC Cooperative wireless networks
US9225471B2 (en) 2002-05-14 2015-12-29 Genghiscomm Holdings, LLC Cooperative subspace multiplexing in communication networks
US9270421B2 (en) 2002-05-14 2016-02-23 Genghiscomm Holdings, LLC Cooperative subspace demultiplexing in communication networks
US10015034B1 (en) 2002-05-14 2018-07-03 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10840978B2 (en) 2002-05-14 2020-11-17 Genghiscomm Holdings, LLC Cooperative wireless networks
US10778492B1 (en) 2002-05-14 2020-09-15 Genghiscomm Holdings, LLC Single carrier frequency division multiple access baseband signal generation
US10644916B1 (en) 2002-05-14 2020-05-05 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10587369B1 (en) 2002-05-14 2020-03-10 Genghiscomm Holdings, LLC Cooperative subspace multiplexing
US9628231B2 (en) 2002-05-14 2017-04-18 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US9768842B2 (en) 2002-05-14 2017-09-19 Genghiscomm Holdings, LLC Pre-coding in multi-user MIMO
US9800448B1 (en) 2002-05-14 2017-10-24 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US9819449B2 (en) 2002-05-14 2017-11-14 Genghiscomm Holdings, LLC Cooperative subspace demultiplexing in content delivery networks
US10009208B1 (en) 2002-05-14 2018-06-26 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US10389568B1 (en) 2002-05-14 2019-08-20 Genghiscomm Holdings, LLC Single carrier frequency division multiple access baseband signal generation
US20040258026A1 (en) * 2003-06-19 2004-12-23 Lau Kin Nang Method of uplink scheduling for multiple antenna systems
US11804870B2 (en) 2004-01-29 2023-10-31 Neo Wireless Llc Channel probing signal for a broadband communication system
US20090135933A1 (en) * 2004-03-11 2009-05-28 Panasonic Corporation Communication terminal device and communication relay method
US8447244B2 (en) * 2004-03-11 2013-05-21 Panasonic Corporation Communication terminal device and communication relay method
US9277570B2 (en) 2004-06-24 2016-03-01 Apple Inc. Efficient location updates, paging and short bursts
US8917703B2 (en) 2004-06-24 2014-12-23 Apple Inc. Efficient location updates, paging and short bursts
US8014377B2 (en) * 2004-06-24 2011-09-06 Nortel Networks Limited Efficient location updates, paging and short bursts
US20070218889A1 (en) * 2004-06-24 2007-09-20 Nortel Networks Limited Efficient Location Updates, Paging and Short Bursts
US11184037B1 (en) 2004-08-02 2021-11-23 Genghiscomm Holdings, LLC Demodulating and decoding carrier interferometry signals
US11784686B2 (en) 2004-08-02 2023-10-10 Genghiscomm Holdings, LLC Carrier interferometry transmitter
US11671299B1 (en) 2004-08-02 2023-06-06 Genghiscomm Holdings, LLC Wireless communications using flexible channel bandwidth
US10305636B1 (en) 2004-08-02 2019-05-28 Genghiscomm Holdings, LLC Cooperative MIMO
US11646929B1 (en) 2004-08-02 2023-05-09 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US11575555B2 (en) 2004-08-02 2023-02-07 Genghiscomm Holdings, LLC Carrier interferometry transmitter
US11552737B1 (en) 2004-08-02 2023-01-10 Genghiscomm Holdings, LLC Cooperative MIMO
US11431386B1 (en) 2004-08-02 2022-08-30 Genghiscomm Holdings, LLC Transmit pre-coding
US11381285B1 (en) 2004-08-02 2022-07-05 Genghiscomm Holdings, LLC Transmit pre-coding
US11075786B1 (en) 2004-08-02 2021-07-27 Genghiscomm Holdings, LLC Multicarrier sub-layer for direct sequence channel and multiple-access coding
US11804882B1 (en) 2004-08-02 2023-10-31 Genghiscomm Holdings, LLC Single carrier frequency division multiple access baseband signal generation
US12095529B2 (en) 2004-08-02 2024-09-17 Genghiscomm Holdings, LLC Spread-OFDM receiver
US11252006B1 (en) 2004-08-02 2022-02-15 Genghiscomm Holdings, LLC Wireless communications using flexible channel bandwidth
US11252005B1 (en) 2004-08-02 2022-02-15 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US11223508B1 (en) 2004-08-02 2022-01-11 Genghiscomm Holdings, LLC Wireless communications using flexible channel bandwidth
US11018917B1 (en) 2004-08-02 2021-05-25 Genghiscomm Holdings, LLC Spreading and precoding in OFDM
US9282535B2 (en) 2004-10-15 2016-03-08 Apple Inc. Efficient location updates, paging and short bursts
US20130070628A1 (en) * 2006-01-30 2013-03-21 Motorola Mobility Llc System and method for allocating sub-channels in a network
US20080043712A1 (en) * 2006-08-18 2008-02-21 Fujitsu Limited Communication Systems
US20110165834A1 (en) * 2006-08-18 2011-07-07 Fujitsu Limited Communication Systems
US9491737B2 (en) 2006-08-18 2016-11-08 Fujitsu Limited Communication systems
US20080043711A1 (en) * 2006-08-18 2008-02-21 Fujitsu Limited Communication Systems
US20080076433A1 (en) * 2006-09-27 2008-03-27 Samsung Electronics Co. Ltd. System and method to transmit/receive signal in a mobile communication system
US7929995B2 (en) * 2006-09-27 2011-04-19 Samsung Electronics Co., Ltd. System and method to transmit/receive signal in a mobile communication system
US20100074350A1 (en) * 2006-11-06 2010-03-25 Qualcomm Incorporated Codeword level scrambling for mimo transmission
US20080205333A1 (en) * 2007-02-28 2008-08-28 Qualcomm Incorporated Uplink scheduling for fairness in channel estimation performance
US8792922B2 (en) * 2007-02-28 2014-07-29 Qualcomm Incorporated Uplink scheduling for fairness in channel estimation performance
US20090067382A1 (en) * 2007-09-06 2009-03-12 Qualcomm Incorporated Methods and apparatus for improved utilization of air link resources in a wireless communications system including a multi-antenna element base station
US8325671B2 (en) * 2007-09-06 2012-12-04 Qualcomm Incorporated Methods and apparatus for improved utilization of air link resources in a wireless communications system including a multi-antenna element base station
US20120028570A1 (en) * 2008-08-18 2012-02-02 Sumei Sun Analog space-time relay method and apparatus for a wireless communication relay channel
US8630580B2 (en) * 2008-08-18 2014-01-14 Agency For Science, Technology And Research Analog space-time relay method and apparatus for a wireless communication relay channel
US20160274240A1 (en) * 2015-03-20 2016-09-22 Qualcomm Incorporated Autonomous satellite automatic gain control
US10641901B2 (en) * 2015-03-20 2020-05-05 Qualcomm Incorporated Autonomous satellite automatic gain control
US11894965B2 (en) 2017-05-25 2024-02-06 Tybalt, Llc Efficient synthesis and analysis of OFDM and MIMO-OFDM signals
US11018918B1 (en) 2017-05-25 2021-05-25 Genghiscomm Holdings, LLC Peak-to-average-power reduction for OFDM multiple access
US11700162B2 (en) 2017-05-25 2023-07-11 Tybalt, Llc Peak-to-average-power reduction for OFDM multiple access
US11570029B2 (en) 2017-06-30 2023-01-31 Tybalt Llc Efficient synthesis and analysis of OFDM and MIMO-OFDM signals
US11196603B2 (en) 2017-06-30 2021-12-07 Genghiscomm Holdings, LLC Efficient synthesis and analysis of OFDM and MIMO-OFDM signals
US11917604B2 (en) 2019-01-25 2024-02-27 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access
US10880145B2 (en) 2019-01-25 2020-12-29 Genghiscomm Holdings, LLC Orthogonal multiple access and non-orthogonal multiple access
US11791953B2 (en) 2019-05-26 2023-10-17 Tybalt, Llc Non-orthogonal multiple access
US11115160B2 (en) 2019-05-26 2021-09-07 Genghiscomm Holdings, LLC Non-orthogonal multiple access
US11343823B2 (en) 2020-08-16 2022-05-24 Tybalt, Llc Orthogonal multiple access and non-orthogonal multiple access

Also Published As

Publication number Publication date
EP1890415A3 (fr) 2008-08-20
CN1748383A (zh) 2006-03-15
HK1112546A1 (zh) 2008-09-05
AU2003285626A8 (en) 2004-07-09
WO2004056029A2 (fr) 2004-07-01
EP1890415A2 (fr) 2008-02-20
CN102938667B (zh) 2016-05-11
KR20050084310A (ko) 2005-08-26
CN1748383B (zh) 2012-08-08
US20040114618A1 (en) 2004-06-17
EP1576756A2 (fr) 2005-09-21
EP2363969B1 (fr) 2016-05-11
WO2004056029A3 (fr) 2004-08-26
CN102938667A (zh) 2013-02-20
EP2363969A1 (fr) 2011-09-07
EP1890415B1 (fr) 2016-11-02
AU2003285626A1 (en) 2004-07-09
KR101033104B1 (ko) 2011-05-06
EP2365656A1 (fr) 2011-09-14

Similar Documents

Publication Publication Date Title
US7508798B2 (en) Virtual mimo communication system
US10356805B2 (en) Methods and systems for scheduling in a virtual MIMO communication environment
US10110285B2 (en) Pilot scheme for a MIMO communication system
CN100586050C (zh) 多输入一多输出信道中提高带宽效率的方法和系统
KR101276191B1 (ko) 송신장치, 송신방법, 수신장치 및 수신방법
EP2293481B1 (fr) Codage de vitesse variable pour liaison aller
US7986746B2 (en) Content differentiated hierarchical modulation used in radio frequency communications
US8050697B2 (en) Multi-antenna scheduling system and method
EP3554029B1 (fr) Transmission de canal de diffusion physique (pbch) pour une détection fiable de configuration d'antenne
RU2526886C2 (ru) Способ передачи данных по технологии mimo и передатчик (варианты)
US20110299615A1 (en) Systems for processing differentiated hierarchical modultation used in radio frequency communications
WO2007124566A1 (fr) Systèmes et procédés de transmission adaptive
KR20070096539A (ko) 직교 주파수 분할 다중 시스템에서 제어 채널 송수신 장치및 방법
US8699603B1 (en) Iterative precoding selection

Legal Events

Date Code Title Description
AS Assignment

Owner name: NORTEL NETWORKS LIMITED, CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TONG, WEN;MA, JIANGLEI;ZHU, PEIYING;AND OTHERS;REEL/FRAME:013592/0260

Effective date: 20021210

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: ROCKSTAR BIDCO, LP, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORTEL NETWORKS LIMITED;REEL/FRAME:027164/0356

Effective date: 20110729

AS Assignment

Owner name: 2256355 ONTARIO LIMITED, ONTARIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ROCKSTAR BIDCO, LP;REEL/FRAME:028018/0848

Effective date: 20120229

Owner name: RESEARCH IN MOTION LIMITED, CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:2256355 ONTARIO LIMITED;REEL/FRAME:028020/0474

Effective date: 20120302

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: BLACKBERRY LIMITED, ONTARIO

Free format text: CHANGE OF NAME;ASSIGNOR:RESEARCH IN MOTION LIMITED;REEL/FRAME:034012/0031

Effective date: 20130709

FPAY Fee payment

Year of fee payment: 8

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 12

AS Assignment

Owner name: OT PATENT ESCROW, LLC, ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BLACKBERRY LIMITED;REEL/FRAME:063471/0474

Effective date: 20230320

AS Assignment

Owner name: MALIKIE INNOVATIONS LIMITED, IRELAND

Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:OT PATENT ESCROW, LLC;REEL/FRAME:064015/0001

Effective date: 20230511

AS Assignment

Owner name: MALIKIE INNOVATIONS LIMITED, IRELAND

Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:BLACKBERRY LIMITED;REEL/FRAME:064066/0001

Effective date: 20230511

AS Assignment

Owner name: MALIKIE INNOVATIONS LIMITED, IRELAND

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT 12817157 APPLICATION NUMBER PREVIOUSLY RECORDED AT REEL: 064015 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:OT PATENT ESCROW, LLC;REEL/FRAME:064807/0001

Effective date: 20230511

Owner name: MALIKIE INNOVATIONS LIMITED, IRELAND

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE APPLICATION NUMBER PREVIOUSLY RECORDED AT REEL: 064015 FRAME: 0001. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:OT PATENT ESCROW, LLC;REEL/FRAME:064807/0001

Effective date: 20230511

Owner name: OT PATENT ESCROW, LLC, ILLINOIS

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE COVER SHEET AT PAGE 50 TO REMOVE 12817157 PREVIOUSLY RECORDED ON REEL 063471 FRAME 0474. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:BLACKBERRY LIMITED;REEL/FRAME:064806/0669

Effective date: 20230320